Patents by Inventor Raghavan Rajagopalan

Raghavan Rajagopalan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20050281741
    Abstract: Cyanine and Indocyanine dye compounds and bioconjugates are disclosed. The present invention includes several cyanine and indocyanine dyes, including bioconjugates of the same, with a variety of bis- and tetrakis (carboxylic acid) homologues. The compounds of the invention may be conjugated to bioactive peptides, carbohydrates, hormones, drugs, or other bioactive agents. The small size of compounds of the invention allows favorable delivery to tumor cells as compared to larger molecular weight imaging agents. Further, use of a biocompatible organic solvent such as dimethylsulfoxide may be said to assist in maintaining the fluorescence of compounds of the invention.
    Type: Application
    Filed: March 9, 2005
    Publication date: December 22, 2005
    Inventors: Samuel Achilefu, Raghavan Rajagopalan, Richard Dorshow, Joseph Bugaj, Muthunadar Periasamy
  • Publication number: 20050271592
    Abstract: Cyanine and indocyanine dye compounds and bioconjugates are disclosed. The present invention includes several cyanine and indocyanine dyes, including bioconjugates of the same, with a variety of bis- and tetrakis (carboxylic acid) homologues. The compounds of the invention may be conjugated to bioactive peptides, carbohydrates, hormones, drugs, or other bioactive agents. The small size of compounds of the invention allows favorable delivery to tumor cells as compared to larger molecular weight imaging agents. Further, use of a biocompatible organic solvent such as dimethylsulfoxide may be said to assist in maintaining the fluorescence of compounds of the invention.
    Type: Application
    Filed: June 6, 2005
    Publication date: December 8, 2005
    Inventors: Samuel Achilefu, Raghavan Rajagopalan, Richard Dorshow, Joseph Bugaj, Muthunadar Periasamy
  • Publication number: 20050201939
    Abstract: Dye-peptide conjugates useful for diagnostic imaging and therapy are disclosed. The dye-peptide conjugates include several cyanine dyes with a variety of bis- and tetrakis(carboxylic acid) homologues. The small size of the compounds allows more favorable delivery to tumor cells as compared to larger molecular weight imaging agents. The various dyes are useful over the range of 350-1300 nm, the exact range being dependent upon the particular dye. Use of dimethylsulfoxide helps to maintain the fluorescence of the compounds. The molecules of the invention are useful for diagnostic imaging and therapy, in endoscopic applications for the detection of tumors and other abnormalities and for localized therapy, for photoacoustic tumor imaging, detection and therapy, and for sonofluorescence tumor imaging, detection and therapy.
    Type: Application
    Filed: May 10, 2005
    Publication date: September 15, 2005
    Applicant: MALLINCKRODT INC.
    Inventors: Samuel Achilefu, Raghavan Rajagopalan, Richard Dorshow, Joseph Bugaj
  • Patent number: 6939532
    Abstract: Dye-peptide conjugates useful for diagnostic imaging and therapy are disclosed. The dye-peptide conjugates include several cyanine dyes with a variety of bis- and tetrakis(carboxylic acid) homologues. The small size of the compounds allows more favorable delivery to tumor cells as compared to larger molecular weight imaging agents. The various dyes are useful over the range of 350-1300 nm, the exact range being dependent upon the particular dye. Use of dimethylsulfoxide helps to maintain the fluorescence of the compounds. The molecules of the invention are useful for diagnostic imaging and therapy, in endoscopic applications for the detection of tumors and other abnormalities and for localized therapy, for photoacoustic tumor imaging, detection and therapy, and for sonofluorescence tumor imaging, detection and therapy.
    Type: Grant
    Filed: January 9, 2001
    Date of Patent: September 6, 2005
    Assignee: Mallinckrodt, Inc.
    Inventors: Samuel I. Achilefu, Raghavan Rajagopalan, Richard B. Dorshow, Joseph E. Bugaj
  • Publication number: 20050163715
    Abstract: Highly hydrophilic indole and benzoindole derivatives that absorb and fluoresce in the visible region of light are disclosed. These compounds are useful for physiological and organ function monitoring. Particularly, the molecules of the invention are useful for optical diagnosis of renal and cardiac diseases and for estimation of blood volume in vivo.
    Type: Application
    Filed: March 17, 2005
    Publication date: July 28, 2005
    Applicant: MALLINCKRODT INC.
    Inventors: Samuel Achilefu, Hermo Jimenez, Raghavan Rajagopalan, Richard Dorshow, Joseph Bugaj
  • Publication number: 20050137170
    Abstract: The present invention discloses novel steroid mimics wherein a tri- or tetravalent phosphorous atom is isosterically substituted at any one of the seventeen positions occupied by the carbon atom in the steroidal skeleton, and wherein each adjacent position to the phosphorous is either unsubstituted or optionally substituted by nitrogen or an oxygen atom to satisfy the valency of said phosphorous atom. The invention is illustrated schematically below using both aromatic and non-aromatic steroids. Although the isosteric substitution phosphorous atom in the above structures 3-7 is indicated at 13, 14, and 17 positions, it is to be noted that the phosphorous can be substituted at any one of the seventeen positions in non-aromatic or eleven positions in aromatic steroids. The phosphorous atom may be trivalent or tetravalent, and may be radioactive or non-radioactive. The adjacent atoms, X, Y, or Z may be carbon, oxygen, or nitrogen.
    Type: Application
    Filed: November 19, 2004
    Publication date: June 23, 2005
    Applicant: Bioflexis, LLC
    Inventor: Raghavan Rajagopalan
  • Patent number: 6887854
    Abstract: Highly hydrophilic indole and benzoindole derivatives that absorb and fluoresce in the visible region of light are disclosed. These compounds are useful for physiological and organ function monitoring. Particularly, the molecules of the invention are useful for optical diagnosis of renal and cardiac diseases and for estimation of blood volume in vivo.
    Type: Grant
    Filed: May 13, 2003
    Date of Patent: May 3, 2005
    Assignee: Mallinckrodt Inc.
    Inventors: Samuel Achilefu, Hermo N. Jimenez, Raghavan Rajagopalan, Richard B. Dorshow, Joseph E. Bugai
  • Publication number: 20050031542
    Abstract: Novel tumor specific phototherapeutic and photodiagnostic agents are disclosed. The compounds consist of a carbocyanine dye for visualization, photosensitizer for photodynamic treatment, and tumor receptor-avid peptide for site-specific delivery of the probe and phototoxic agent to diseased tissues. A combination of these elements takes full advantage of the unique and efficient properties of each component for an effective patient care management.
    Type: Application
    Filed: May 17, 2004
    Publication date: February 10, 2005
    Applicant: MALLINCKRODT INC.
    Inventors: Samuel Achilefu, Richard Dorshow, Raghavan Rajagopalan, Joseph Bugaj
  • Publication number: 20040253182
    Abstract: Novel tumor specific phototherapeutic and photodiagnostic agents are disclosed. The compounds consist of a carbocyanine dye for visualization, photosensitizer for photodynamic treatment, and tumor receptor-avid peptide for site-specific delivery of the probe and phototoxic agent to diseased tissues. A combination of these elements takes full advantage of the unique and efficient properties of each component for an effective patient care management.
    Type: Application
    Filed: May 17, 2004
    Publication date: December 16, 2004
    Applicant: MALLINCKRODT INC.
    Inventors: Samuel Achilefu, Richard B. Dorshow, Raghavan Rajagopalan, Joseph E. Bugaj
  • Publication number: 20040248877
    Abstract: Compounds of Formula 8 are provided: 1
    Type: Application
    Filed: April 30, 2004
    Publication date: December 9, 2004
    Inventors: Sandeep Gupta, David Michael Carrig, Raghavan Rajagopalan, Prabhavathi Fernandes
  • Publication number: 20040241095
    Abstract: Cyanine dye bioconjugates useful for diagnostic imaging and therapy are disclosed. The conjugates include several cyanine dyes with a variety of bis- and tetrakis (carboxylic acid) homologes. The compounds are be conjugated to bioactive peptides, carbohydrates, hormones, drugs, or other bioactive agents. The small size of the compounds allows more favorable delivery to tumor cells as compared to larger molecular weight imaging agents. The various dyes are useful over the range of 350 to 1,300 nm, the exact range being dependent upon the particular dye. The use of a biocompatible organic solvent such as dimethylsulfoxide helps to maintain the fluorescence of the compounds. The inventive compounds are useful for diagnostic imaging and therapy, in endoscopic applications for the detection of tumors and other abnormalities, for localized therapy, for photoacoustic tumor imaging, detection and therapy, and for sonofluorescence tumor imaging, detection and therapy.
    Type: Application
    Filed: March 15, 2004
    Publication date: December 2, 2004
    Applicant: Mallinckrodt Inc.
    Inventors: Samuel Achilefu, Raghavan Rajagopalan, Richard B. Dorshow, Joseph Bugaj, Muthunadar P. Periasamy
  • Publication number: 20040234454
    Abstract: Novel tumor specific phototherapeutic and photodiagnostic agents are disclosed. The compounds consist of a carbocyanine dye for visualization, photosensitizer for photodynamic treatment, and tumor receptor-avid peptide for site-specific delivery of the probe and phototoxic agent to diseased tissues. A combination of these elements takes full advantage of the unique and efficient properties of each component for an effective patient care management.
    Type: Application
    Filed: May 17, 2004
    Publication date: November 25, 2004
    Applicant: MALLINCKRODT INC.
    Inventors: Samuel Achilefu, Richard B. Dorshow, Raghavan Rajagopalan, Joseph E. Bugaj
  • Publication number: 20040223913
    Abstract: Highly hydrophilic indole and benzoindole derivatives that absorb and fluoresce in the visible region of light are disclosed. These compounds are useful for physiological and organ function monitoring. Particularly, the molecules of the invention are useful for optical diagnosis of renal and cardiac diseases and for estimation of blood volume in vivo.
    Type: Application
    Filed: December 23, 2003
    Publication date: November 11, 2004
    Applicant: Mallinckrodt, Inc.
    Inventors: Samuel Achilefu, Raghavan Rajagopalan, Richard B. Dorshow, Joseph E. Bugaj, Muthunadar P. Periasamy
  • Publication number: 20040213740
    Abstract: Highly hydrophilic indole and benzoindole derivatives that absorb and fluoresce in the visible region of light are disclosed. These compounds are useful for physiological and organ function monitoring. Particularly, the molecules of the invention are useful for optical diagnosis of renal and cardiac diseases and for estimation of blood volume in vivo.
    Type: Application
    Filed: January 2, 2004
    Publication date: October 28, 2004
    Applicant: Mallinckrodt Inc.
    Inventors: Samuel Achilefu, Raghavan Rajagopalan, Richard B. Dorshow, Joseph E. Bugaj, Hermo N. Jimenez, Muthunadar P. Periasamy
  • Publication number: 20040202611
    Abstract: Highly hydrophilic indole and benzoindole derivatives that absorb and fluoresce in the visible region of light are disclosed. These compounds are useful for physiological and organ function monitoring. Particularly, the molecules of the invention are useful for optical diagnosis of renal and cardiac diseases and for estimation of blood volume in vivo.
    Type: Application
    Filed: October 7, 2003
    Publication date: October 14, 2004
    Applicant: Mallinckrodt Inc.
    Inventors: Samuel Achilefu, Raghavan Rajagopalan, Richard B. Dorshow, Joseph E. Bugaj, Muthunadar P. Periasamy
  • Publication number: 20040180864
    Abstract: The present invention discloses novel aromatic azide derivatives and their bioconjugates for phototherapy of tumors and other lesions. The organic azides of the present invention are designed to absorb low-energy ultraviolet, visible, or near-infrared (NIR) region of the electromagnetic spectrum. The phototherapeutic effect is caused by direct interaction of nitrene, the reactive intermediate produced upon photoexcitation of the aromatic azide, with the tissue of interest. The compounds of the present invention are administered to a patient, allowed to accumulate at the site of the tumor or other lesion, and are exposed to light in order to perform a phototherapeutic procedure.
    Type: Application
    Filed: March 24, 2004
    Publication date: September 16, 2004
    Applicant: MALLINCKRODT INC.
    Inventors: Raghavan Rajagopalan, Gary Cantrell, Samuel I. Achilefu, Joseph E. Bugai, Richard B. Dorshow
  • Publication number: 20040180809
    Abstract: Highly hydrophilic indole and benzoindole derivatives that absorb and fluoresce in the visible region of light are disclosed. These compounds are useful for physiological and organ function monitoring. Particularly, the molecules of the invention are useful for optical diagnosis of renal and cardiac diseases and for estimation of blood volume in vivo.
    Type: Application
    Filed: March 31, 2004
    Publication date: September 16, 2004
    Applicant: MALLINCKRODT INC.
    Inventors: Samuel Achilefu, Raghavan Rajagopalan, Richard B. Dorshow, Joseph E. Bugaj
  • Publication number: 20040161430
    Abstract: The present invention discloses dye-azide derivatives and their bioconjugates for dual phototherapy of tumors and other lesions. The compounds of the present invention may contain either a mixture of Type 1 and Type 2 agents or a single entity that integrates both units in the same molecules. The compounds are designed to produce both Type 1 and Type 2 phototherapeutic effect at once using dual wavelength light source that will produce singlet oxygen and nitrene at the lesion of interest.
    Type: Application
    Filed: February 11, 2004
    Publication date: August 19, 2004
    Applicant: MALLINCKRODT INC.
    Inventors: Raghavan Rajagopalan, Samuel I. Achilefu, Joseph E. Bugai, Richard B. Dorshow
  • Publication number: 20040156783
    Abstract: The invention discloses compounds and compositions for dual phototherapy and combined therapy and diagnosis of tumors and other lesions. The compounds have a Dye that, when photoactivated, operates via Type I and/or Type II mechanisms. Other Dye or azide components may operate by the same or different mechanisms. Selection of particular components in a compound, and formulation of the compound(s) in a composition permit different activation wavelengths to be used for different therapies. A targeting moiety may be added to the compound or composition so that the Dye locates at a particular site, such as a hormone-sensitive tumor, for diagnosis and/or treatment. The compounds and compositions may be incorporated within liposomes.
    Type: Application
    Filed: October 14, 2003
    Publication date: August 12, 2004
    Applicant: Mallinckrodt Inc.
    Inventors: Raghavan Rajagopalan, Samuel I. Achilefu, Joseph E. Bugaj, Richard B. Dorshow, Muthunadar P. Periasamy
  • Publication number: 20040151667
    Abstract: Methods using internal image antibodies for photodiagnosis and/or phototherapy. The internal image antibodies are conjugated with a photoactive molecule such as a dye or photosensitizer, to target specific regions, such as biological receptors. The photoactive molecules are then activated for diagnosis or therapy. Advantageously, the internal image antibody is specific for a biological receptor, but does not require isolation of the receptor to prepare the antibody, and provides the desired specificity and selectivity for targeted diagnosis or therapy.
    Type: Application
    Filed: January 21, 2004
    Publication date: August 5, 2004
    Applicant: MALLINCKRODT INC.
    Inventors: Raghavan Rajagopalan, Joseph E. Bugaj, Samuel I. Achilefu, Richard B. Dorshow